公开(公告)号：US20200295348A1

公开(公告)日：2020-09-17

申请号：US16810392

申请日：2020-03-05

Applicant: TDK CORPORATION

Inventor： Yuusuke YAMAGUCHI ,  Tohru INOUE ,  Yasuhiro TAKAGI

IPC: H01M4/131 ,  H01M4/525 ,  H01M4/505 ,  H01M10/0585 ,  H01M10/0525

Abstract: Disclosed herein is a negative electrode for non-aqueous electrolyte secondary battery that includes a negative electrode current collector, and a negative electrode active material layer. An area change rate and a thickness change rate of the negative electrode active material layer associated with charging are 0.1% or more and 10% or more, respectively. A triangular region having an intersection between first and second straight lines, a first point existing on the first straight line and being away from the intersection in the first direction toward the first side by a first distance, and a second point exists on the second straight line and being away from the intersection in the second direction toward the second side by a second distance, as vertices are cut away such that the triangular region has neither the negative electrode current collector nor the negative electrode active material layer.

公开(公告)号：US20250167286A1

公开(公告)日：2025-05-22

申请号：US18841125

申请日：2022-09-30

Applicant: TDK CORPORATION

Inventor： Hiroshi SATO ,  Yuusuke YAMAGUCHI ,  Shota SUZUKI ,  Hisaji OYAKE ,  Masayuki MUROI

IPC: H01M10/0525 ,  H01M4/131 ,  H01M10/0562

Abstract: An all-solid-state battery including a sintered body including a positive electrode, a negative electrode and a solid electrolyte layer between the positive electrode and the negative electrode, in which the positive electrode contains a Ag-containing compound, a Li-containing transition metal oxide and an oxide having a composition different from a composition of the Li-containing transition metal oxide, the oxide contains Ag, and at least a part of the Ag-containing compound and the Li-containing transition metal oxide is present in the positive electrode with the oxide present therebetween.

公开(公告)号：US20250167295A1

公开(公告)日：2025-05-22

申请号：US18841244

申请日：2022-09-28

Applicant: TDK CORPORATION

Inventor： Hiroshi SATO ,  Tomoko NAKAMURA ,  Yuusuke YAMAGUCHI ,  Shota SUZUKI ,  Ayaka NAGATOMI

IPC: H01M10/0562 ,  H01M4/131 ,  H01M10/0525

Abstract: An all-solid-state battery according to the present embodiment includes a sintered body having a positive electrode, a negative electrode and a solid electrolyte layer that is between the positive electrode and the negative electrode, the positive electrode contains a compound having a spinel structure, the solid electrolyte layer contains a solid electrolyte having a γ-Li3PO4-type crystal structure, the compound having a spinel structure is represented by LiαMβMn2−βO4 . . . (1), and, in the formula (1), M is one or more atoms selected from transition metals, 0.8≤α≤1.2 is satisfied, and 0.1≤β≤0.9 is satisfied.

公开(公告)号：US20250167294A1

公开(公告)日：2025-05-22

申请号：US18841232

申请日：2022-09-28

Applicant: TDK CORPORATION

Inventor： Hiroshi SATO ,  Tomoko NAKAMURA ,  Yuusuke YAMAGUCHI ,  Shota SUZUKI ,  Ayaka NAGATOMI

IPC: H01M10/0562 ,  H01M4/38

Abstract: An all-solid-state battery according to the present embodiment includes a sintered body having a positive electrode, a negative electrode and a solid electrolyte layer disposed between the positive electrode and the negative electrode, the solid electrolyte layer contains a solid electrolyte having a γ-Li3PO4-type crystal structure, and the negative electrode contains pure Ag or a Ag alloy and at least one compound of LiαTiO3 (2≤α≤2.8) and LiβTiSiO5 (2≤β≤4).